根据《南方电网公司营销分析管理办法》，属于电力市场营销分析的是（）。
A. 宏观经济发展分析
B. 电力市场分析
C. 公司电力销售分析
D. 公司购电分析
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证券公司应于每月结束后（）个工作日内按要求向协会报送区域性市场业务月度报表
A. 2
B. 3
C. 4
D. 5
You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） for backup and recovery of your database. You executed the delete command in RMAN to delete a backup of a tablespace. Which statement is true in this scenario？（）
A. The backup status will be marked expired in RMAN recovery catalog.
B. The backup status will be marked deleted in RMAN recovery catalog after you execute the crosscheck command.
C. The backup will be deleted physically from the OS （Operating system）and the backup information is removed from the recovery catalogl
D. The backup status will be marked deleted and you must delete the backup file manually from the OS （Operating system）.
E. The backup status will be marked deleted and you must delete the backup file manually from the OS （Operating system）， if you are not using Oracle Managed Files （OMF）.
自动液位计高液位报警处置方法是（）。
A. 鼠标双击关闭
B. 鼠标双击通讯状态栏
C. 鼠标双击取消
D. 鼠标双击工作状态栏
预防鸡传染性喉气管炎常用的疫苗为（）
A. 弱毒疫苗
B. 灭活疫苗
C. 核酸疫苗
D. 合成肽疫苗
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